AP9101CAK-BOTRG1 Equivalent & Substitute Parts

Part Overview

The AP9101CAK-BOTRG1 is a battery protection IC for single-cell lithium-ion/polymer applications, manufactured by Diodes Incorporated. This Surface Mount device in SOT-25 packaging provides over-current and over-voltage fault protection. The part is currently Active in product status with 764 units in stock. Substitute parts are necessary when the primary part becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when inventory constraints necessitate sourcing from available alternatives with identical electrical and mechanical specifications.

Key Parameters

Parameter	Value
Manufacturer	Diodes Incorporated
Category	Power Management (PMIC)
Function	Battery Protection
Battery Chemistry	Lithium Ion/Polymer
Number of Cells	1
Fault Protection	Over Current, Over Voltage
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	SC-74A, SOT-753
Supplier Device Package	SOT-25
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution of the AP9101CAK-BOTRG1 is determined by strict equivalence across the following parameters:

Electrical Equivalence Criteria:

Manufacturer: Diodes Incorporated
Function: Battery Protection
Battery Chemistry: Lithium Ion/Polymer
Number of Cells: 1
Fault Protection: Over Current, Over Voltage
Operating Temperature Range: -40°C ~ 85°C (TA)

Mechanical Equivalence Criteria:

Mounting Type: Surface Mount
Package / Case: SC-74A, SOT-753
Supplier Device Package: SOT-25

Compliance Equivalence Criteria:

RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)
REACH Status: REACH Unaffected

All substitute parts listed maintain identical electrical specifications and package footprint. Variations exist only in packaging format (Tape & Reel vs. Cut Tape) and product status (Active vs. Obsolete). These packaging differences do not affect electrical performance or PCB compatibility.

Parameter Comparison

Part Number	Manufacturer	Packaging	Product Status	Inventory (Pcs)	Function	Battery Chemistry	Cells	Fault Protection	Temp Range	Package	RoHS
AP9101CAK-BOTRG1	Diodes Incorporated	Tape & Reel (TR)	Active	764	Battery Protection	Lithium Ion/Polymer	1	Over Current, Over Voltage	-40°C ~ 85°C	SOT-25	ROHS3
AP9101CAK-ABTRG1	Diodes Incorporated	Cut Tape (CT) & Digi-Reel®	Obsolete	3100	Battery Protection	Lithium Ion/Polymer	1	Over Current, Over Voltage	-40°C ~ 85°C	SOT-25	ROHS3
AP9101CAK-AKTRG1	Diodes Incorporated	Cut Tape (CT) & Digi-Reel®	Obsolete	8700	Battery Protection	Lithium Ion/Polymer	1	Over Current, Over Voltage	-40°C ~ 85°C	SOT-25	ROHS3
AP9101CAK-ANTRG1	Diodes Incorporated	Cut Tape (CT)	Obsolete	9300	Battery Protection	Lithium Ion/Polymer	1	Over Current, Over Voltage	-40°C ~ 85°C	SOT-25	ROHS3
AP9101CAK-BRTRG1	Diodes Incorporated	Tape & Reel (TR)	Obsolete	3946	Battery Protection	Lithium Ion/Polymer	1	Over Current, Over Voltage	-40°C ~ 85°C	SOT-25	ROHS3
AP9101CAK-CPTRG1	Diodes Incorporated	Tape & Reel (TR)	Obsolete	3732	Battery Protection	Lithium Ion/Polymer	1	Over Current, Over Voltage	-40°C ~ 85°C	SOT-25	ROHS3
AP9101CK-AHTRG1	Diodes Incorporated	Cut Tape (CT) & Digi-Reel®	Obsolete	14500	Battery Protection	Lithium Ion/Polymer	1	Over Current, Over Voltage	-40°C ~ 85°C	SOT-25	ROHS3
AP9101CK-AKTRG1	Diodes Incorporated	Cut Tape (CT)	Obsolete	3820	Battery Protection	Lithium Ion/Polymer	1	Over Current, Over Voltage	-40°C ~ 85°C	SOT-25	ROHS3
AP9101CK-ASTRG1	Diodes Incorporated	Cut Tape (CT)	Obsolete	9400	Battery Protection	Lithium Ion/Polymer	1	Over Current, Over Voltage	-40°C ~ 85°C	SOT-25	ROHS3
AP9101CK-AUTRG1	Diodes Incorporated	Cut Tape (CT)	Obsolete	4300	Battery Protection	Lithium Ion/Polymer	1	Over Current, Over Voltage	-40°C ~ 85°C	SOT-25	ROHS3
BQ29729DSER	Texas Instruments	Cut Tape (CT) & Digi-Reel®	Active	6371	Battery Protection	Lithium Ion/Polymer	1	Over Current, Over/Under Voltage, Short Circuit	-40°C ~ 85°C	6-WSON (1.5x1.5)	ROHS3

Engineering Selection Recommendations

Diodes Incorporated AP9101 Series (Parametric Equivalents): All AP9101 variants maintain identical electrical functionality and SOT-25 package footprint. Selection among these parts depends on packaging format availability and product status:

AP9101CAK-BOTRG1 (Active, Tape & Reel): Primary selection for new designs and high-volume production requiring reel packaging.
AP9101CAK-ABTRG1, AP9101CAK-AKTRG1, AP9101CK-AHTRG1 (Obsolete, Cut Tape & Digi-Reel): Suitable for manual assembly or low-volume applications where cut tape format is acceptable. Obsolete status indicates limited future availability.
AP9101CAK-ANTRG1, AP9101CK-AKTRG1, AP9101CK-ASTRG1, AP9101CK-AUTRG1 (Obsolete, Cut Tape): Suitable for manual assembly only. Obsolete status indicates limited future availability.
AP9101CAK-BRTRG1, AP9101CAK-CPTRG1 (Obsolete, Tape & Reel): Alternative reel-packaged options with obsolete status.

Texas Instruments BQ29729DSER (Manufacturer Recommended Alternative): The BQ29729DSER is a manufacturer-recommended substitute from Texas Instruments. This part differs in package format (6-WSON vs. SOT-25) and provides enhanced fault protection (Over Current, Over/Under Voltage, Short Circuit vs. Over Current, Over Voltage). PCB redesign is required to accommodate the different package footprint. This option is suitable when design flexibility permits package change and enhanced protection features are beneficial.

Frequently Asked Questions (FAQ)

Q: Can I use AP9101CAK-ABTRG1 as a direct replacement for AP9101CAK-BOTRG1? A: Yes. Both parts are electrically and mechanically identical. The difference is packaging format: AP9101CAK-BOTRG1 is supplied in Tape & Reel format, while AP9101CAK-ABTRG1 is supplied in Cut Tape & Digi-Reel format. Compatibility depends on your assembly equipment capability. Note that AP9101CAK-ABTRG1 is Obsolete.

Q: What is the difference between Cut Tape and Tape & Reel packaging? A: Tape & Reel (TR) packaging supplies components on continuous reels suitable for automated pick-and-place assembly equipment. Cut Tape (CT) packaging supplies components on tape segments, suitable for manual assembly or lower-volume production. Both formats contain identical components with identical electrical performance.

Q: Why is BQ29729DSER listed as a substitute if it has a different package? A: BQ29729DSER is a manufacturer-recommended alternative that provides the same battery protection function for single-cell lithium-ion/polymer applications. However, it uses a 6-WSON package instead of SOT-25, requiring PCB redesign. It offers enhanced fault protection including under-voltage detection and short-circuit protection.

Q: Are all AP9101 variants ROHS3 compliant? A: Yes. All listed AP9101 variants and the BQ29729DSER are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited) and REACH Unaffected status.

Q: What does "Obsolete" product status mean for substitute selection? A: Obsolete status indicates the manufacturer has discontinued the part. While existing inventory may be available, future procurement cannot be guaranteed. For new designs, prioritize Active status parts (AP9101CAK-BOTRG1 or BQ29729DSER).

Q: Can I mix packaging formats in the same production run? A: Mixing packaging formats is not recommended for automated assembly. Select a single packaging format (Tape & Reel or Cut Tape) based on your assembly equipment capability to ensure consistent production workflow.

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